// /src/pages/hot/hot.vue
<script setup lang="ts">
import { getHotRecommendAPI } from '@/api/hot';
import type { HotResult, SubTypeItem } from '@/types/hot';
import { onLoad } from '@dcloudio/uni-app';
import { reactive } from 'vue';
import { ref } from 'vue';

// 定义页面数据
const listData = reactive({})
// 定义封面图
const bannerPicture = ref('')
// 推荐选项
const subTypes = ref<SubTypeItem[]>([])
// 高亮下标
const activeIndex = ref(0)
// 热门推荐页 标题和url
const hotMap = [
  { type: '1', title: '特惠推荐', url: '/hot/preference' },
  { type: '2', title: '爆款推荐', url: '/hot/inVogue' },
  { type: '3', title: '一站买全', url: '/hot/oneStop' },
  { type: '4', title: '新鲜好物', url: '/hot/new' },
]
const query = defineProps<{
  type: string
}>()
const currentHot = hotMap.find(item=>item.type === query.type)
uni.setNavigationBarTitle({title: currentHot!.title})
// 获取热门推荐组件数据方法
const getHotRecommendData = async ()=>{
  const res = await getHotRecommendAPI(currentHot!.url, {
    //技巧，用于测试分页结束数据加载完毕情况： 环境变量，开发环境，修改初始页面方便测试分页结束数据加载完毕情况
    page: import.meta.env.DEV ? 30 : 1,
    pageSize: 10
  })
  console.log('res', res)
  bannerPicture.value = res.result.bannerPicture
  subTypes.value = res.result.subTypes
  // listData = res.result
}
const handleActive = (index: number)=>{
  activeIndex.value = index
}
// 页面数据加载中的flag
const isFinish = ref(false)
// 页面滚动到底部事件
const onScrolltolower = async () =>{
  const currentSubTypes = subTypes.value[activeIndex.value]
  let {page, pages} = currentSubTypes.goodsItems
  if(page < pages){
    //当前页码++
    currentSubTypes.goodsItems.page++
  }else{
    uni.showToast({
      icon: 'none',
      title: '已经没有更多数据了...',
      duration: 500
    })
    isFinish.value = true
    return
  }
  
  const res = await getHotRecommendAPI(currentHot!.url, {
    subType: currentSubTypes.id,
    page: currentSubTypes.goodsItems.page,
    pageSize: currentSubTypes.goodsItems.pageSize
  })
  // 新的列表选项
  const newsubTypes = res.result.subTypes[activeIndex.value]
  // 数组追加;为了响应式，弃用concat连接数组，转用push实现数组连接
  currentSubTypes.goodsItems.items.push(...newsubTypes.goodsItems.items)
}
onLoad(()=>{
  getHotRecommendData()
})
</script>

<template>
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image
      style="width: 100%;"
        :src="bannerPicture"
      ></image>
    </view>
    <!-- 推荐选项 -->
    <view class="tabs">
      <!-- <text class="text active">抢先尝鲜</text> -->
      <text v-for="(item, index) in subTypes" :key="item.id" class="text" :class="{active: activeIndex === index}" @tap="handleActive(index)">{{item.title}}</text>
    </view>
    <!-- 推荐列表 -->
    <scroll-view scroll-y class="scroll-view" v-for="(item, index) in subTypes" v-show="activeIndex === index" @scrolltolower="onScrolltolower">
      <view class="goods">
        <navigator
          hover-class="none"
          class="navigator"
          v-for="goods in item.goodsItems.items"
          :key="goods.id"
          :url="`/pages/goods/goods?id=${goods.id}`"
        >
          <image
            class="thumb"
            :src="goods.picture"
          ></image>
          <view class="name ellipsis">{{goods.name}}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{goods.price}}</text>
          </view>
        </navigator>
      </view>
      <view class="loading-text">{{ isFinish ? '没有更多数据了~' : '正在加载...'}}</view>
    </scroll-view>
  </view>
</template>

<style lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}
.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}
.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;
}
.scroll-view {
  flex: 1;
  overflow-y: scroll;
}
.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
  .text {
    margin: 0 20rpx;
    position: relative;
  }
  .active {
    &::after {
      content: '';
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #db1818;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}
.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
  .navigator {
    width: 44%;
    padding: 20rpx;
    margin-top: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }
  .thumb {
    width: 305rpx;
    height: 305rpx;
  }
  .name {
    height: 88rpx;
    font-size: 26rpx;
  }
  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }
  .symbol {
    font-size: 70%;
  }
  .decimal {
    font-size: 70%;
  }
}

.loading-text {
  text-align: center;
  font-size: 28rpx;
  color: #666;
  padding: 20rpx 0 50rpx;
}
</style>